Grinding machine



FIG. 1 is a first perspective view of a grinding machine showing my new design;

FIG. 2 is a second perspective view of FIG. 1, viewed in another aspect;

FIG. 3 is a first front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a exploded view of FIG. 1 thereof;

FIG. 10 is a third perspective view of FIG. 1, showing the grinding machine in a state of use; and,

FIG. 11 is a second front view of FIG. 3, showing the grinding machine in a state of use.

The broken line showing of the environment is for illustrative purposes only and forms no part of the claimed design. 

CLAIM I claim the ornamental design for a grinding machine, as shown and described. 